@mixin size($width, $height, $radius: null) {
	width: $width;
	height: $height;
	@if ($radius != "" and $radius != null) {
		border-radius: $radius;
	}
}

@mixin absolute(
	$top: null,
	$right: null,
	$bottom: null,
	$left: null,
	$index: null,
	$center: null
) {
	position: absolute;
	@if ($left != "" and $left != null) {
		left: $left;
	}
	@if ($right != "" and $right != null) {
		right: $right;
	}
	@if ($top != "" and $top != null) {
		top: $top;
	}
	@if ($bottom != "" and $bottom != null) {
		bottom: $bottom;
	}
	@if ($index != "" and $index != null) {
		z-index: $index;
	}
	@if ($center != null) {
		transform: translate(-50%, -50%);
	}
}

@mixin background(
	$src: null,
	$position: center,
	$repeat: no-repeat,
	$size: 100% 100%
) {
	background: url($src) $position $repeat;
	background-size: $size;
}

@mixin font(
	$size: 14px,
	$line: null,
	$color: #fff,
	$align: center,
	$weight: null,
	$style: null
) {
	font-size: $size;
	@if ($color != "" and $color != null) {
		color: $color;
	}
	@if ($align != "" and $align != null) {
		text-align: $align;
	}
	@if ($line != "" and $line != null) {
		line-height: $line;
	}
	@if ($weight != "" and $weight != null) {
		font-weight: $weight;
	}
	@if ($style != "" and $style != null) {
		font-style: $style;
	}
}

@mixin flex(
	$align: center,
	$justify: space-between,
	$direction: null,
	$wrap: null
) {
	display: flex;
	@if ($align != "" and $align != null) {
		align-items: $align;
	}
	@if ($justify != "" and $justify != null) {
		justify-content: $justify;
	}
	@if ($direction != "" and $direction != null) {
		flex-direction: $direction;
	}
	@if ($wrap != "" and $wrap != null) {
		flex-wrap: $wrap;
	}
}
